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  • Mise à jour de la version 0.1 vers 0.2

    24 juin 2013, par

    Explications des différents changements notables lors du passage de la version 0.1 de MediaSPIP à la version 0.3. Quelles sont les nouveautés
    Au niveau des dépendances logicielles Utilisation des dernières versions de FFMpeg (>= v1.2.1) ; Installation des dépendances pour Smush ; Installation de MediaInfo et FFprobe pour la récupération des métadonnées ; On n’utilise plus ffmpeg2theora ; On n’installe plus flvtool2 au profit de flvtool++ ; On n’installe plus ffmpeg-php qui n’est plus maintenu au (...)

  • Personnaliser en ajoutant son logo, sa bannière ou son image de fond

    5 septembre 2013, par

    Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

Sur d’autres sites (16111)

  • Programmatically get non-overlapping images from MP4

    16 novembre 2019, par Carlos F

    My ultimate goal is to get meaningful snapshots from MP4 videos that are either 30 min or 1 hour long. "Meaningful" is a bit ambitious, so I have simplified my requirements.

    The image should be crisp - non-overlapping, and ideally not blurry. Initially, I thought getting a keyframe would work, but I had no idea that keyframes could have overlapping images embedded in them like this :enter image description here

    Of course, some keyframe images look like this and those are much better :

    enter image description here

    I was wondering if someone might have source code to :

    Take a sequence of say 10-15 continuous keyframes (jpg or png) and identify the best keyframe from all of them.

    This must happen entirely programmatically. I found this paper : http://research.microsoft.com/pubs/68802/blur_determination_compressed.pdf

    and felt that I could "rank" a few images based on the above paper, but then I was dissuaded by this link : Extracting DCT coefficients from encoded images and video given that my source video is an MP4. Of course, this confuses me because the input into the system is just a sequence of jpg images.

    Another link that is interesting is :

    Detection of Blur in Images/Video sequences

    However, I am not sure if this will work for "overlapping" images.

  • Optimizing Painting video encoding in Android

    26 octobre 2013, par coder000001

    I want to create live painting video as export feature for a painting application.

    I can create a video with a series of images, with the use of a library ( FFMPEG or MediaCodec). But, this would require too much processing power to compare the images and encode the video.

    While drawing, I know exactly which pixels are changed. So, I can save lot of processing if I can pass this info to FFMPEG, instead of having the FFMPEG figure this out from the images.

    Is there away to efficiently encode the video for this purpose ?

  • Adding a filter and title cards to user uploaded videos [on hold]

    5 septembre 2013, par Django Reinhardt

    A client is interested in applying a Sepia style filter, as well as title cards, to user-uploaded videos on their website. This would obviously be automated on their webserver, and it seems ffmpeg is a good way to make this happen.

    Unfortunately, from what I've read, such processing would require a lot of webserver CPU power — far more than the average webserver usually has. How can I practically perform these calculations on a website ?

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